OK, i set up all i can see on your screens, and nothing happened.
(one of colours i set was Active buttons options – Background color – #ff0000 (red)
Then i updated XSTORE to todays 4.22 !
Then in the basket it seemed to be fine (red) in basket rollup. But not in Your order box (still beige)
But then i wanted to change colour to little bit different red e93939 (as in demo) by – Active buttons options – Background color
and then it broken again back to beige color (Checkout button).
then tried to overwrite all files with update 4.22 and buttons still remains beige (even when red in settings).
Hope i wrote it naturally…